Tim Beissmann

The first images and details of the 2013 Porsche 911 Carrera 4 and 4S coupe and cabriolet have leaked online just hours out from the official unveiling of the new-generation all-wheel drive models.

Porsche is set to confirm official details of the new variants later today ahead of the world premiere of the 911 Carrera 4 and 4S at the 2012 Paris motor show on September 27.

Like previous generations of the 911, the leaked images confirm the all-wheel drive variants will look virtually identical to their rear-wheel drive siblings, with the red reflective strip and ‘4/4S’ badging across the rear the most obvious differentiators.

The images also reveal a radar sensor in the front centre air intake, indicating Porsche’s adaptive cruise control system will be available on the new four-paw models.

Both models’ powertrains will be unchanged from the 2WD variants, with the Carrera 4 producing 257kW and 390Nm from its 3.4-litre six-cylinder engine and the Carrera 4S pumping out 294kW and 440Nm from its larger 3.8-litre powerplant.

The new 911 Carrera 4 and 4S are expected to join Porsche’s Australian line-up in 2013, and will likely attract a three to four per cent price increase over the 997-series models in line with the increases for the 2WD 991-series variants.

The now-discontinued 997-series Porsche 911 Carrera 4 manual coupe was priced from $248,000 before on-road costs in Australia, while the flagship 4S PDK cabriolet topped the line-up at $300,100.